Spark-plug holder.



G. M-. HOLDEN L H. G. HEDERSHOT.

SPARK PLUG HOLDER. APPLIOATION ,FILED 1330.21, lao.

960,09 1 Patented May 31, 1910.

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UNITED sTArns 4PiaTIJNTI? OFFICE;v

CHARLES MOB/TON HOLDEN .AND HENRY GLOWACKI HENDERSHOT, 0F SAN FRANCISCO,CALIFORNIA.

SPARK-PLUG HOLDER.

.To all whom t concern."

Beit known that'we, CHARLES MoR'roN HOLDEN and HENRY. GwWAcKI HENDER-sHoT,'citizens ofthe United States, residing in the city and county ofSan Francisco and State 'of California, have invented new and .usefulImprovements in Spark-Plug Holders, of which the following is aspecificatibn. l

Our invention relates'to a device for detachably holdingspark -plugswith relation to .the chamberk 1n -which ignition is. to take place.

It consists in' the combination of partsand in details of constructionwhich will be more fully explained by reference to the accompanyingdrawings, in which- Figure 1 is a side elevation. Fig. 2 is a verticaltransverse section' on line a-a of Fig.A 1. Fig. 3 `is a plan viewunlocked. Figeis a plan View locked. Fig. 5 is a horizontal section online b-,b Fi 1. Fig. 6 is a bottom View of limiting co lar. 7 is adetailperspective View of clamp nut and socket-piece. Fig. 8 is aperspective -view of socketiece.

The object 0 our invention is Uto provi-de a means for quickly andhermetically securing spark plugs in position so that they may bereadily removed and replaced without loss oftime. Y

As shown in` the drawing, A is a tubular socket-piece having intheinterior, seats 2 and 3.

The s ark plug consistssubstantially of a porce ain non-conductor 4fitted .into a socket piece y 5., and locked in place by a hollow nut 6.The' socket-piece has twoconical. shoulders and .8, the'shoulder 8fitting into the conicalinterior of thel part A, and the shoulder?fitting into a seat. formed b the cone 2,

. into which the cone 7 is groun so as to forniV position.

a gas-tight joint, and the two serve to guide and hold the plug in theproper straight.

The' art A has its inner endscrew-threaded to the correspondingscrew-threaded opening inthe gas. chamber where the ignitlon is to takeplace. `U'pon the opposite p a'rtV Ats an enlarged 'screwprojecting l s10 upon opposite si es. y l1 is Ya `co lar screw-threaded to ,zt `theSpecication of`Letters Patent. Patented luay 31, 1910, Application ledDecember 21, 1909. Serial No. 534,360.

screw down over the outside of this flange. This collar has two oppositesides ofthe in,

terior opening made circular and concentric 12. These .chords 12 are soformed as to register and stand in line -with thelugs 10 formed on thetop of the flange 9. 'l

The upper part of the member 5, in .which the plug 4 is secured, has aflange-13, .two opposite sides of which are curved` to coincide with andfit into the segmental arcs of the'part 11, .while the intermediatesides are iattened so as to fit between the flattened chords 12 whichunite the segmental arcs -of the part 11. When it is desired to intro--duce the spark plug, "the chords or straight portions 12 are broughtinto position to register with the corresponding lugs 10 on the flange 9of the part A, and the plu carrier or holder 5 may then 'be introduced.threads ofthe flange'9 andjis adapted to'l by bringing the straightsides "of its ian'ge' into alinement with the straight sides previouslynamed. In this position, the curved projecting parts of the flange 13will be below the level ofthe straight portions 12 of the collar 11, andwhen the latter is turned, these straight portions will pass across thecurved portions 13 of the holder 5, and as the part 11 has beenscrew-threaded it will move downwardly upon the corresponding threadedflange of. the part A, and ywill thus clamp the portion 12 upon thecurved segmental ortions 13 of the holder 5, and will thus loc it andtheplug carried by it, firmly to the part A. L

14 is a collar fitting upon the outside of the part -A beneath' the part11, -and this collar has a iiange 15, the edge of which is cut awayi:'or a certain ,distance having shoulders at` each end of this cut-awaportion which are adapted to be engage by a 15 fixed in the ignblenchamber, a screw 20 stanta what we claim and desire toseenreby LettersPatent is- 1'. A park plug holder consisting of a tubular sockel;`scum/threaded to be-xed in 5vthei "igfon' chamber and having a screw#threaxld'ngevat the top, with nzfv'hrly projecting lugs, an interierlyscrew-aineaded 1 collar turnable upon said flange, .she nteror of whichis in "hform of opposed 10 segments, and straight sides uniting saidSegments and capable of registering Wvlth the lugs-'of,thea11ge, and aspark 'plug ttlng betveen the-lugs of the socket ange, and

lokableby turning the cellar.

2. A tubular socket piece aflsvpte vto be threadel collar 'en the secketpiece, having a top penng with flatenecl opposite Wells, rand a s arkplug fashioned $0 conform ,sue to the interior of "che socket piece andhavmg a flange ai; 'the top with a'ttened ofgoste' edges adapted .tmoregister with the l e Walls of the o, enng in the cellen, seid vplugbeing locke in lpla-ce by seewng down the eel'la' U la the ebened Wallsthereof cresswse ei plug'.

3. The. combina-tion in a spark plug holde1,'of e #embalar socketadapted tobe seemed in s, combus'en chamber, and hav ing' interiorsee'ss, plug having surfaces to tsncl ferm. a jlent with seid seats, anda, flange alf-eend the te@ wl' ettened Opposte edges, a sexeW-lreededflange nnen JL'he socket, with upwardly projectn'lg segmental .lugs uponopposite sidega screwthreaded` cellar minable upon the socket flange,and edape to engage and leek the eine .'n testimony 'V reef We have setour hands ne 'presence el sexihing Witnesses.

me like Walls of the 'neleunto two sub-

